package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.User;
import com.itheima.reggie.service.UserService;
import com.itheima.reggie.utils.SMSUtils;
import com.itheima.reggie.utils.ValidateCodeUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author jay
 */
@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 发送手机短信验证码
     * @param user
     * @param session
     * @return
     */
    @PostMapping("/sendMsg")
    public R<String> sendMsg(@RequestBody User user, HttpSession session){
        //获取手机号
        String phone = user.getPhone();
        //判断手机号是否为空
        if(StringUtils.isNotEmpty(phone)){
            //使用工具类生成4位数验证码
            String code = ValidateCodeUtils.generateValidateCode(4).toString();
            log.info("code = {}", code);
            //调用阿里云提供的短信服务API完成发送短信
            //SMSUtils.sendMessage("阿里云短信测试", "测试专用模板", phone, code);
            //将生成的验证码保存到Session
            //session.setAttribute(phone, code);
            //将生成的验证码缓存到redis中
            redisTemplate.opsForValue().set(phone,code,5, TimeUnit.MINUTES);
            return R.success("手机验证码发送成功");
        }

        return R.error("短信发送失败");
    }

    /**
     * 移动端登录
     * @param map
     * @param session
     * @return
     */
    @PostMapping("/login")
    public R<User> login(@RequestBody Map map, HttpSession session){
        log.info("map = {}", map);
        String phone = map.get("phone").toString();// 获取手机号
        String code = map.get("code").toString();// 获取验证码
        // 从Session中获取保存的验证码
        //String codeInSession = (String) session.getAttribute(phone);
        // 从redis中获取保存的验证码
        String codeInRedis = (String) redisTemplate.opsForValue().get(phone);
        // 是否是原来的手机号
        if(codeInRedis == null){
            return R.error("手机号错误");
        }
        //验证码是否正确
        if(codeInRedis.equals(code)){
            //正确, 判断当前手机号对应的用户是否为新用户，如果是则自动完成注册(加入数据库)
            LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(User::getPhone, phone);
            User user = userService.getOne(queryWrapper);
            if(user == null){
                user = new User();
                user.setPhone(phone);
                user.setStatus(1);
                userService.save(user);
            }
            session.setAttribute("user",user.getId());
            //用户登录成功。验证码删除
            redisTemplate.delete(phone);
            return R.success(user);
        }
        return R.error("验证码错误");
    }

    /**
     * 移动端退出方法
     * @param request
     * @return
     */
    @PostMapping ("/loginout")
    public R<String> logout(HttpServletRequest request) {
        //清理session中保存的当前用户id  => user
        HttpSession session = request.getSession();
        session.removeAttribute("user");
        return R.success("退出成功");
    }
}
